Transcription of Understanding Heat Range - Autolite
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TECHNICAL INFORMATIONREAL PERFORMANCE. REAL VALUE. 2017 FRAM Group IP, LLC, 1900 West Field Court, Lake Forest, IL 60045 Printed in USA0617 Understanding heat RangeTIP TEMPERATURE2500200015001000500 PreignitionElectrode Burning ErosionCarbon and Fuel FoulingHot PlugNormal PlugCold PlugEach engine has different temperature characteristics; typical plug temperature ranges are illustrated SPEEDFULL THROTTLEThe shorter the path, the faster the heat is dissipated and the cooler the Loads / High Speeds SHORT Insulator Tip Fast heat Transfer LOWER heat Range COLD PLUGThe longer the path, the slower the heat is dissipated and the hotter the Trip / Stop-and-Go LONG Insulator Tip Slow heat Transfer HIGHER heat Range HOT PLUGWhy is heat Range Critical?It is the measure of how fast the spark plug tip dissipates combustion heat . It must do this in a controlled manner that will:1. Stay cool enough to avoid pre-ignition and/or electrode destruction.
Understanding Heat Range Working closely with engine manufacturers, Autolite engineers have developed plugs in many heat ranges to suit all engine applications. They range from COLD through MEDIUM; and HOT to EXTREMELY HOT. Rules for selecting the correct plug are to follow manufacturer’s specifications. Selecting the Right Heat Range. COLD ...
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